Wireless Power Transfer System for Hyperthermia Therapy

Hyperthermia therapy attracts attension as a low-inversive target treatment for deep-positioned cancer. One of the hyperthermia therapies is hgh-frequency induction heating type by using nano-mgnetic materials and magnetic implants. A tumor with injected magnetic materials is heated by hysteresis loss and eddy-current loss under high frequency magnetic fields with a few handred kHz and a few mT. To generate magnetic fields at the deep position of body, we proposed double pancake type exciting system that consists with two flat coils at both sides of body. This paper discusses a wireless exciting system to generate AC magnetic fields rather than transmit energy to load. The experimantal results proved that a wireless transmission enables us to excite two pancake coils and generate magnetic fields in deep position like series-connected coils